The purchased manual is an high-quality scan of the original JVC paper-based Service Manual. The Service Manual includes the Owner´s Manual, so you do not have to buy both of them.
Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
This is a great site. I placed my order and by the next am it was available for download. Had some problems with some missing copy on some pages. Once I brought the error to the OMC's attention, the issue was resolved. I'll come back again.
Text excerpt from page 5 (click to view)
4. PRECAUTIONS
To prevent damage of the thermal head caused by static electricity when assembling the chassis ass'y into the unit, the following steps must be followed; 1. Turn the power switch off. 2. Discharge the capacitor C15 (2200µF) on the PCB Z554-1. 3. Connect the FPC of chassis ass'y into a connector CN201 of the Z554-2 ass'y. 4. Assemble the chassis ass'y. 5. Turn the power switch on. (Refer to the Disassembly view (Z554-1 ass'y) of 17 page.))
Figure-2
5. MEASUREMENT
Measure each value according to the following table and figure, if necessary. Measurement point Vcc Vp Ibat+ (Displaying) Ibat+ (Printing) Ibat+ (Power off) Min. Max. Min. Max. Typ. Max. Typ. Max. Typ. Max. Voltage/Current 4.875 V 5.125 V 10.78 V 11.22 V 9 mA 19 mA 0.6 A 0.7 A 10 µA 30 µA When printing at diagnostic program PRINT CHECK 2 Turning power switch off. Turning power switch on. Ip = 300 mA Icc = 30 mA Condition
Note: Ibat+ = Power source (Batteries) Vbat+ = 11 V ± 2% Table-2